Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5bd767cc550393…

MALICIOUS

PDF

52.1 KB Created: 2021-08-09 07:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff31d0c30578f990b016ff216519f1f0 SHA-1: 541fbc37dc39689e7c9f28a35ae4e565343da81f SHA-256: af5bd767cc5503931846e95ead87c1ae5c0c70181cd13f650e0745c5fb0179df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm patterns, directing users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to compromised or disposable hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8025

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=cd+key+nfs+most+wanted+2005+chomikuj PDF link annotation
    • http://benhvienlaptop.biz/userfiles/file/79029970290.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/roludukinafu.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/198766fd3220ea4ea88ae40eac58e9a9/diwebakalomogawure.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/96054475004.pdfIn PDF document text
    • https://tepihtrava.rs//files/pirowu.pdfIn PDF document text
    • https://airbays.com/userfiles/file/18084253556.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/dcf6bb2ba02fbbd8941143bf2ac8f2b2/60709494707.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/fakugukijuli.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b6f5a279ec50743b0e85909c4b26f4b/vefolujiwinalixukonowute.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/noxatopano.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608951b8989b8---kumul.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160845974271d2---5810891447.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/29522173363.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/070818da82330ffeadd5111357c41905/66273761834.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/18/file/20210518_004937_200.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/35241574997.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/fobek.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/kr2kattkkdelt63qovgvq0ve6k/zawad.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6824a9e78---debenura.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160fb0d558e1c3---nukuzupubejidezomi.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/delunel.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/fd15da19989c17d5ee3b9e644a1f0619/66164853855.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b207b28d4df---99214250141.pdfIn PDF document text

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